Welding machine



o@ 4, 1932' E. J. voN HENKE 1,880,535

A WELDING MACHINE vFiled May 24, 1929 4 Sheets-Sheet l l ATTORNE 4 Sheets-Sheet 2 4, 1932. E. J. voN HENKE WELDING MACHINE Filed may 24, 1929 Oct. 4, 1932. E. J. voN HENKE 1,880,535

WELDING MACHINE Filed May 24, 1929 4 Sheets-Sheet 5 INVENTOR ATTORNEY Oct. 4, 1932. E. J. voN HENKE 1,880,535

WELDING MACHINE Filed May 24, 1929 4 sheets-sheet 4 INVENTOR Patented Oct. 4,' 1932 UNITED STATES PATENT OFFICE.

mm I. von Immun, or cIIIcAoO. ILLINOIS, AssIoNOn 'ro AMERICAN nLEo'rnIo FUSION CORPORATION, or cHIcAoo, ILLINOIS, A CORPORATION or ILLINOIS WELDING IACHINI Application med lay a4, 192s. mm1 No. 365,802.

This invention relates to al novel and improved welding machine, the novel features of which will be understood from the following description and the annexed drawings in which I have shown a selected embodiment of the invention and in which:

Fig. 1 is a Vertical sectional view through a machine constructed according to the invention, parts being shown in elevation.

Fig. 2 is a view taken from the left of Fig. 1 but showing the top unit and its contents in section, this section being taken approximately on the line 2--2 of Fig. 1.

Fig. 3 is a horizontal section on an enlarged scale, taken approximately on the line 3-3 of Fig. 1.

Fi 4 is a section taken approximately on the line 4-4 of Fig. 3.

Fig. 5 is a view partly in elevation and partly in section of the toggle mechanism shown in Fig. 1, this view being taken from the right of Fig. 1.

Fig. 6 is a view taken from the right of Fig. 1 and showing the means for holding and adjusting one of the electrodes.

Fig. 7 is a bottom plan view of the structure appearing in Fig. 6.

Fig. 8 isa section on the line 8-8 of Fig. 6.

eferring first to Fig. 1, the machine compri ses three units, a base unit 1, a transformer unit 2, and a top unit 3. In the base unit may be placed any suitable controlling mechanism for the transformer 4 in the unit 2.

There is indicated at 5 part of such a controlling means.

Connected to the transformer 4 is a pair l of electrodes 6 and. 7, the electrode 6 being former by the iiexible conductor 11.

The top unit 3 is used to contain and support the means for operating the electrode 7, and this means will now be described. Suit- /ably supported on the unit 3 is a motor 12 connected to ashaft 13 having thereon a worm 14 driving a worm gear 15 which is mounted on a shaft 16, as best shown in Fig. 2. This shaft has secured thereto a gear 17 meshing with a gear 18 on a shaft 19. This shaft carries a pinion 20 meshing with a gear 21 on a shaft 22.

As best shown in Fig. 4, the shaft 22 is hollow and forms a bearing for a shaft 23 rotatably mounted therein. This shaft carries a cam 24 which contacts with a cam roller 25 mounted on a rocker arm 26. This rocker arm is journaied on a pivot 274 and forms 'part of a rocker which includes another arm 28 to which is pivoted a link 29 connected at its other end with a joint 30 of a toggle. This toggle comprises two arms 31 and 32. The arm 31 is pivoted at its other end at 33 to the head 34 for the electrode 7, the electrode being secured to this head by means of a holder 35 which will be described more in detail later.

In order to hold the cam roller 25 in contact with the cam'24, a suitable bracket 36 is mounted on the front of the unit 3, and sliding through a bearing in this bracket is a rod 37 surrounded by a compression spring 38, this spring contacting at one end with the bearing on the bracket and on the other end with an enlargement on therod. The rod is connected to the arm 28 and therefore the spring normally holds the arm to the left, as viewed in Fig. 1, and in which position the cam roller will be in contact with the cam. l

Referring now particularly to Figs. 1 and 5, it will be seen that the arm 32 is slidably mounted in a bearing 39 which rotates on a stationary pivot 40. The bearing has integral therewith a cup 41 within which is received a compression spring42, this spring bearing against the bottom of the cup an exerted by the toggle is always a resilient one, and the amount of the pressure maybe regulated by ad'ustment of the abutment 43.

The initial e ective length of the arm 32 may be adjusted byadjustment of the nuts 44 on the t ireaded end of the arm. By loosening these nuts the spring will move the arm downwardly, as viewed 1n Figs. .1 and 5,

and therefore lengthen the distance between the joint 30 and the pivot 40, this of course increasing the effective length of the arm. This adjustment is usually made as `an initial one and then the sprin pressure can be varled b adjustment of t e abutment 43.

The e ective length of the link 29 may be varied by means of a suitable adjustin member 45.indicated diagrammatica ly in igs. 1 and 3.

As will be seen from the aboveV description, the shaft 22 will be continually, rotating so long as current is sup lied to the ymotor 12, that is, during normal operations the shaft 22 will be continually in motion, and normally the shaft 23 will bestationary. It is maintained stationary by the *following means.

Secured to the shaft 22 is a clutch element 46 which is adapted to cooperate with a mating clutch element 47 on the shaft 23. These clutch elements are normally held out of engagement as indicated in Figs. 2 and 4. The element 47 is fastened on a sleeve 48 which is splined upon the shaft 23, and this sleeve has thereon"a cam 49 which may be of the form indicated in Figs. 3 and 4. The entire sleeve and consequently the clutch element is urged towards the right as viewed in these figures, by means of a compression spring 50, but movement of the sleeve is resisted by means of a pin 51 slidably mounted to move towards and away from the sleeve 48 and normally urged towards the sleeve by means of a spring 52.' "When the pin is moved away from the sleeve to the position shown in Fig. 3, the spring 50 will cause the engage ment of the clutch elements, as plainly shown in that igure. This movement of the pin may be caused by the mechanism indicated 'in Fig. 1, this mechanism comprising a bellcrank lever 53 having one end 54 received in a slot in the pin and the other end pivoted to a verticallyextending rod' 55. This rod is connected at its lower end to a second bellcrank lever 56 which n'turn is connected to a link 57 extending to the front of the machine, and which may be moved towards the right in Fig. 1 by any suitable means operated by a treadle 58.

In operation, the shaft 22 will be continu-r and 47 out of engagement. When the parts are in this position, the electrode 7 is also then contactin in the osition shown in Fig. 1,that is, spaced l 'from t e electrode 6. The work to be welded -is placed 'between the electrodes and then the workman resses downy on the treadle 58 which wil cause movemen't of the pin 51 out of engagement with the cam 49. As soon as the pin is released the spring 50 will force ythe element 47 into en a ement with thel element 46. 4Motion wil t en be imparted to the shaft 23 and consequently the cam 24 whichA will operate the to gle .to bring the arms thereof. towards their strai htened position. The operation of the togg e causes downward movement of the electrode 7. f 1

The cam 24 is. of such shape and size as to cause the electrode 7 to be held in engagement with the 'work disposed between it and the electrode 6 for a suliicient length of time to perform the welding operation., The treadle v58 may be released as soon as the clutch elementsare in engagement, the end of the pin with the ortion 59 of the cam 49. The ace 60 of t e cam is of such shape as to 4come in contact with the vpin -51 during continued rotation ofA the shaft 23, and the pin willgradually force the sleeve 48 to the left as viewed in Fi 4 until the 'clutch elements are disengage the normal rotation lof the shaft 23 being clockwise, as\5 viewed in Fig. 1, and'in the direction ofthe arrow shown 1n Fig. 4. By the'time thecam and pin have reached the position shown in Fig. 4, the clutch elements will be entirely disengaged.

Referring now to Figs. 6, 7 and 8, I have shown therein the means by which the electrode 7 may be supported and adjusted. The holder 35 may be secured to the head 34 as by bolts 61. The electrode is received in a bore in 'the holder', in which it is held in position by a set screw 62. Between the upper end of the electrode and the head 34 are placed blocks 63 and 64, these blocks having wedge faces en agin veach other and the block 64 being a justa le by means of screws 65 and 66 whichhave threaded engagement with opposite ends of this block, as plainly seen in Fig. 6. By this means an accurate adjustment of the electrode may bey obtained4 in the manner indicated by the arrows y through various bores, leaving at the outlet 68.

1. In a welding machine, an electrode reciprocable towards and away from the work, a toggle adapted to actuate said electrode and Comprlsing two arms jointed together, a pivoted.y connection 5 between one .of said arms and vsaid electrode, Ameans'to operate said toggle, means to *yieldingly urge one of Vsaid arms towardssaidjoint, and means tor-egulate th forceexerted by said yielding means. 'i -2; In a welding machine", an electrode reciprocable towards and away from the work, a toggle'adapted to actuate said electrode `and,

comprising two, arms jointed together, a 1 pivoted connection between one of said arms and said electrode, a 'rotatable bearing vfor the ,other arm, means to vary the distancev v ciprocable towards and away from the work,

a toggle adapted to actuate said electrode and comprising two'arms jointed together, a pivoted connection between one of/ said arms and said electrode, a rotatable bearing for the other arm, means to Vary the distance from said joint to said bearing, means to act on said joint to operate the toggle, and means to regulate the force exerted between said bearing and joint.

4. In a welding machine, an electrode movable towards and away from the work, a toggle adapted to operate said electrodel and comprising two arms jointed together, a pivoted connection between one of ysaid arms and said electrode, an operating link pivoted to said` arms at their joint, and means yieldably urging one of said arms towards said oint.

5. In a weldingmachine, an electrodemovable towards and away from the work, a toggle adapted to operate said electrode and comprising two arms jointed together, a pivoted connection between one of said arms and said electrode, an operating link pivoted to said arms at their joint, means yieldably j urging one of Vsaid arms towards said joint,

and means to regulate the force exerted by said yieldable means.

6. In a welding machine, an electrode movlable towards and away from the work, a

toggle adapted to operate said electrode and comprising two arms ointed together, a pivoted connection between one of said arms and said electrode, an operating link pivoted to saidlarms at their joint, means yieldably urging one of said arms towards said joint, and means to adjust the length of one of said 7. Ina welding machine, an electrode movable towards and away from the work, a toggle adapted to operate said electrode and comprising two arms 'jointed together, apivoted'connection between one of said arms and said electrode, an operating link pivoted'to comprising two arms, one pivoted to said electrode at one end and toan operating member at the other endfa v'second arm pivoted .at one end to said 'first arm' and to ysaid operating member and being slidably mounted in a rotatable bearing, and means to adjust said second arm in said bearing to vary the length of the` arm.

able towards and away from the work, a toggle adapted to operate said electrode and comprising two arms, one pivoted to said electrode at one end and to an operating member at the other end, a second arm pivoted at one end to said first arm and to said operating member and being slidably mounted in a rotatable bearing, and a spring disposed between -saidsecond arm and said bearingand adapted to be compressed upon movement of the toggle arms towards their straightened position.

10. In a welding machine, an electrode movable towards and away from the work.

- 9. In a welding machine, an electrode movi a togglead'apted to operate said electrode and comprising two arms, one pivoted to said electrode at one end and to an operating member at the other end, a second arm pivoted at one end to said first arm and to said operating member and being slidably mounted in a rotatable bearing, means to adjust said second arm in said bearing to vary the length of the arm, and a spring disposed between said second arm and said bearing and adapted to be compressed upon movement of the toggle arms towards theirstraightened position.

11. In a welding machine, an electrode movable towards and away from the work, a toggle adapted to opera-te said electrode and comprising two arms jointed together, an operating link pivoted to said arms at their joint, a rotatable cam adapted to operate said link, means to prevent'rotation of said cam, means to render said preventing means inoperative, and means to rotate the cam.

12. In a welding machine, an electrode movable towards and away from the work, a

toggle adapted to operate said electrode and comprising two arms jointed together, an operating link pivoted to said arms at their joint, a rotatable cam adapted to operate said link, a continually rotating shaft, and means to clutch said cam to said shaft to be rotated thereby.

13. In a welding machine, an electrode movable towards and away from the work, a toggle adapted to operate said electrode and comprising two arms jointed together, an operating link pivoted to said arms at their joint, a rotatable cam adapted to operate said link, a continually .rotating shaft, means to clutch said cam to said shaft to be rotated thereby',`and means normally preventing rotation of said cam but movable to permit said clutching thereof to the shaft.

14. In a welding machine, a continually ro- I tating shaft and a normally stationar shaftclutch elements on said shafts adapte to im part motion from the continually rotating shaft to the normally stationary shaft, a cam on said stationary shaft, a reciprocable pin normally in contact with said cam and holding said clutch elements out of engagement, means to move said pin out of engagement with the cam, a spring adapted upon move- 10 ment of said pin to force said clutch elements into engagement, a toggle adapted to be operated by said normally stationar shaft upon rotation thereof, and an e ectrode adapted to be moved by said toggle. 15 v EDMUND J VON HENKE. 

